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    ada Yu's Avatar
    ada Yu Posts: 1, Reputation: 1
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    #1

    Oct 10, 2007, 10:15 PM
    Newton laws
    A diver with weight of 833 N dives from a boat with a mass of 375 kg. If he leaves the boat with a velocity of 2.25 m/s (W) after accelerating for 0.5 s. What will be the final velocity of the boat.
    terryg752's Avatar
    terryg752 Posts: 197, Reputation: 4
    Junior Member
    		  
    #2

    Oct 11, 2007, 03:49 AM
    I am not sure, but here is an attempt:

    Initial momentum = final momentum = 0 (Conservation of Momentum)

    Find the mass of the man m from his weight.

    When he attains speed of 2.25 his momentum = mv = 2.25 m

    Boat must have corresponding negative momentum = -2.25m

    Let speed of boat = V, mass is 375 ,

    Hence -2.25m = 375 V

    Substitute value of m and find V
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